Eh, in mw3 it depends on the game. Some types and players are tactical.....although more are in bf3. But, the spray and pray is less in mw3 then it was in previous cod games, from what I have seen. And I do see it as well in bf3. Also, in mw3 noobtubing and excessive nads are less and less as well since they lowered teh radius. Making it less likely for people to just sit and tube like they use to in earlier versions. That was the worst about BLOPS. People would launch nads over and over, noob tube constantly, and it would get frustrating at times. However, it was easy to find servers that kicked tubers automatically.....so you could avoid it.
I just typically am in more of a mood to run and gun. Get a bunch of kills, earn kill streaks, and play mindless games that no one depends on my really. Sometimes I prefer the tactical game play that bf3 offers.
But again, and at nauseam... mw3 is quite a bit different then mw2. New weapons, game types, graphics, settings, maps, kill streaks, added death streaks, weapon leveling.... it's not even close to teh same game.